Theoretical Physics blows my mind?

Question

Theoretical Physicists believe that the Big Bang happened without cause and that it created the universe we have today. They also believe that one day the universe will collapse back on itself. If the Big Bang happened once, there is a chance that it could happen again. This could be the billionth universe that has existed. In that case it could be the billionth you or me that has existed. I'm not saying that each universe would have to be the same, but even if they were different 99.99999999999999999999% of the time, there would still be a chance that the same universe would be created, and with infinite time anything and everything would happen. What do you think of this?

Answer 1

Actually, it is quite certain now among astronomers and cosmologists that the Universe is right now undergoing an Accelerated Expansion, meaning that the expansion is not slowing down, but speeding up. So there is very little chance that the Universe will collapse back onto itself. Sorry to "burst your bubble" (no pun intented).

Check out this link for yourself: http://physicsweb.org/articles/world/17/5/7

PS - that's very funny, Ed!

Answer 2

Its quite astonishing what the human mind can think of or imagine at certain times. The event you mentioned here is a beautiful example. To answer your question, i would say that yes it is possible, but just consider the big bang for a while. Do you think that once the universe have collapsed back to an infinitely dense ball, the laws of physics would have any use? No, they will definetly not decide what would happen. Remember everything we know about our universe is based upon certain theories. Which until now have not been able to predict the begining of the universe precisely.
So basically its no use thinking about these things until we have a perfect theory to work as a platform for our imaginations. But still i would say, that human imagnation cannot be restrained so go on.
Anyway, good question.

Answer 3

why not?

this being said, physicists are not in agreement about the ultimate fate of the universe, I mean will it contract again, then expand again, or will it expand forever until all matter and energy is very very diluted.

as for the probability of havig the same you in two consecutive universes (if they happen), it would be much, much lower than what you say. There are about 1E22 stars in the universe, that's a mass of the order of 1E52 kilos, most of it is hydrogen so that's close to 1E76 atoms (w/o counting the rest).

the probability of picking the one single arrangement of atoms that makes "you", say 1e26 atoms or so, out of that 1E76 (I know you're not just hydogen, but we're approximating here), is going to be very very very low.

just one example, there are 1.7E13 possibilities to pick just 10 objects out of a collection of just 100... So here we're talking HUGE numbers, not the measly 1E24 you've used!


as for the "happened w/o cause", that's not true either. They don't believe that - it's just that, for the time being, they don't know what the cause was. It's not just their fault, it is that the theory they're using, General Relativity, breaks down when something gets too small and too dense. So you'd need another theory to fix this issue (and also to understand black holes completely) - they're working on it, but not much progress so far, in about 100 years the theory has been around now...

Answer 4

Most physicists now believe that the universe will continue expanding ever faster and that the universe will gradually expand to the point where only a few galaxies will be visible even with the most powerful telescopes. (It will take billions of years for this to happen, however.) The exact cause of this accelerated expansion is unclear as of yet, but dark energy is the current theory. Unless some other force appears to counteract dark energy (or whatever the cause of the accelerated expansion is), then even the galaxies, stars, planets, and even individual molecules might not be able to hold themselves together (in a trillion years or so??)

Comforting thought, isn't it?

Answer 5

Einstein says the universe started with a bang but will end in a crunch.
he states that at a limit the universe will stop expands and will do the the visa-verse of the bang,i.e, the universe will stop expanding and start compressing and again at a point the bang take place and99.99% the same universe and the things will happen.

Answer 6

It's possible I guess, but the big band theory states that the universe will not collapse in on itself. More interesting is that everything that has happened since the big bang was destined to happen the way it has because everything is made of matter and is affected by the laws of physics.(choice is an illusion)

Answer 7

scientists and philosphers change their minds and views every 5 years when some new variables becomes known. if all these are correct then it is inevitable. the universe will collapse someday and it will shirnk up to its original form . in order to do it again and again if al these are correct. (that i seriously doubt)
this is why trends in phisosophy say that things sometimes happen again and again. that history repats itself.
if this is true though then we are doomed to a masterplan that our fait and whole beiing as long as all the events related are pre-determined and we just complete the puzzle instead of creating its image.
if all these about the big bang are correct then i find that what you suggest might be possible. but as i say
first there were speculations, then more speculations then more speculations and then came cosmology.....

Answer 8

i recognize the sensation, i'm a physics student myself yet I figure, the fashion to bypass into theoretical physics is to completely droop your sense of common sense and to easily settle for what your instructor is conserving because the reality. issues will start up to make sense (in a peculiar, nonsensical way) ultimately.

Answer 9

Chcesz isc ale nie chcesz, nie chcesz wziasc mnie ze soba
Nie chcesz, nie chcesz wziasc mnie ze soba, nie, nie, niechcesz wziasc mnie ze soba
Twoja twarz i milosc pod drzewem lipy
zapamietaj mnie, zapamietam Twoje oczy

Answer 10

Sound to me that you would like to get your masters or PhD in
Physics. Have fun.
I Cr 13;8a
10-7-6